public void SortDescendingShouldSortCorrectly()
{
var model = GridViewUtils.CreateModel();
var filtered = new FilterCollection <DataItem>(model);
filtered.Sort = GridViewUtils.SortItemsDescending;
Assert.AreEqual(model.Count, filtered.Count);
for (var i = 0; i < model.Count; ++i)
{
Assert.AreSame(model[model.Count - 1 - i], filtered[i]);
}
}
public void WithOddItemFilterShouldContainOddModelItems()
{
var model = GridViewUtils.CreateModel();
var filtered = new FilterCollection <DataItem>(model);
filtered.Filter = GridViewUtils.KeepOddItemsFilter;
Assert.AreEqual(model.Count / 2, filtered.Count);
for (var i = 0; i < model.Count / 2; ++i)
{
Assert.AreSame(model[i * 2 + 1], filtered[i]);
}
}
public void SortWithEvenItemsBeforeOddItemsShouldSortCorrectly()
{
var model = GridViewUtils.CreateModel();
var filtered = new FilterCollection <DataItem>(model);
filtered.Sort = GridViewUtils.SortEvenItemsBeforeOdd;
Assert.AreEqual(model.Count, filtered.Count);
for (var i = 0; i < model.Count / 2; ++i)
{
Assert.AreSame(model[i * 2], filtered[i]);
}
for (var i = 0; i < model.Count / 2; ++i)
{
Assert.AreSame(model[i * 2 + 1], filtered[model.Count / 2 + i]);
}
}
public void SortWithEvenItemsBeforeOddItemsAndWithFilterShouldSortAndFilterCorrectly()
{
var model = GridViewUtils.CreateModel();
var filtered = new FilterCollection <DataItem>(model);
filtered.Sort = GridViewUtils.SortEvenItemsBeforeOdd;
filtered.Filter = GridViewUtils.KeepFirstHalfOfItemsFilter;
Assert.AreEqual(model.Count / 2, filtered.Count);
for (var i = 0; i < model.Count / 4; ++i)
{
Assert.AreSame(model[i * 2], filtered[i]);
}
for (var i = 0; i < model.Count / 4; ++i)
{
Assert.AreSame(model[i * 2 + 1], filtered[model.Count / 4 + i]);
}
}
public void RemoveFromParentWhileFilteredShouldBeRemoved()
{
var model = GridViewUtils.CreateModel();
var filtered = new FilterCollection <DataItem>(model);
filtered.Filter = GridViewUtils.KeepOddItemsFilter;
filtered.Sort = GridViewUtils.SortItemsDescending;
NotifyCollectionChangedEventArgs changeArgs = null;
filtered.CollectionChanged += (sender, e) => changeArgs = e;
var itemToRemove1 = model[10];
Assert.AreEqual(-1, filtered.IndexOf(itemToRemove1), "#1-1 Item should NOT be in the filtered collection");
changeArgs = null;
model.RemoveAt(10);
Assert.IsNull(changeArgs, "#1-2 Change should not have been triggered");
Assert.AreEqual(-1, filtered.IndexOf(itemToRemove1), "#1-3 Item should NOT be in the filtered collection");
var itemToRemove2 = model[10];
Assert.AreEqual(44, filtered.IndexOf(itemToRemove2), "#2-1 Item should be in the filtered collection");
changeArgs = null;
model.Remove(itemToRemove2);
Assert.AreEqual(-1, filtered.IndexOf(itemToRemove2), "#2-2 Item should NOT be in the filtered collection");
// verify change notification
Assert.IsNotNull(changeArgs, "#3-1 Change should have been triggered");
Assert.AreEqual(NotifyCollectionChangedAction.Remove, changeArgs.Action, "#3-2 Item should have triggered a remove notification");
Assert.AreEqual(44, changeArgs.OldStartingIndex, "#3-3 Index of remove notification is incorrect");
Assert.IsNotEmpty(changeArgs.OldItems, "#3-4 Old items of change event should not be empty");
Assert.AreEqual(11, ((DataItem)changeArgs.OldItems[0]).Id, "#3-5 Old item of notification is not correct");
filtered.Filter = null;
Assert.AreEqual(NotifyCollectionChangedAction.Reset, changeArgs.Action, "#4 Changing filter should send a reset notification");
filtered.Sort = null;
// should be in the same inserted position in the source model
Assert.AreEqual(-1, filtered.IndexOf(itemToRemove1), "#5-1 Item should NOT be in the filtered collection");
Assert.AreEqual(-1, filtered.IndexOf(itemToRemove2), "#5-2 Item should NOT be in the filtered collection");
Assert.AreEqual(model.Count, filtered.Count, "#5-3 Count in filtered does not match model");
}
public void RemoveItemWhenSortedShouldRemoveCorrectItems()
{
var model = GridViewUtils.CreateModel();
var filtered = new FilterCollection <DataItem>(model);
// sort in reverse
filtered.Sort = (x, y) => y.Id.CompareTo(x.Id);
// test removing from the filtered collection
filtered.RemoveAt(80);
Assert.IsFalse(filtered.Any(r => r.Id == 19), "Removing the 80th filtered row should remove item #19");
Assert.IsFalse(model.Any(r => r.Id == 19), "Removing the 80th filtered row should remove item #19 from the model");
// test removing from the model
model.Remove(model.First(r => r.Id == 20));
Assert.IsFalse(filtered.Any(r => r.Id == 20), "Removing Item #20 should no longer show up in the filtered collection");
Assert.IsFalse(model.Any(r => r.Id == 20), "Removing Item #20 should no longer be in the model");
}
public void AddFromSourceWhileFilteredShouldAddCorrectly()
{
var model = GridViewUtils.CreateModel();
var filtered = new FilterCollection <DataItem>(model);
filtered.Filter = GridViewUtils.KeepOddItemsFilter;
filtered.Sort = GridViewUtils.SortItemsDescending;
NotifyCollectionChangedEventArgs changeArgs = null;
filtered.CollectionChanged += (sender, e) => changeArgs = e;
var item = new DataItem(1000);
changeArgs = null;
model.Add(item);
// should not exist in filtered
Assert.AreEqual(-1, filtered.IndexOf(item), "#1-1 Item should NOT be in the filtered collection");
Assert.IsNull(changeArgs, "#1-2 Inserting an item that doesn't match the filter shouldn't raise a change notification");
item = new DataItem(1001);
changeArgs = null;
model.Add(item);
Assert.AreEqual(0, filtered.IndexOf(item), "#2-1 Item should be in the filtered collection");
Assert.IsNotNull(changeArgs, "#3-1 Change should have been triggered");
Assert.AreEqual(NotifyCollectionChangedAction.Add, changeArgs.Action, "#3-2 Item should have triggered an add notification");
Assert.AreEqual(0, changeArgs.NewStartingIndex, "#3-3 Index of add notification is incorrect");
Assert.IsNotEmpty(changeArgs.NewItems, "#3-4 New items of change event should not be empty");
Assert.AreEqual(1001, ((DataItem)changeArgs.NewItems[0]).Id, "#3-5 New item of notification is not correct");
filtered.Filter = null;
filtered.Sort = null;
// should be in the same inserted position in the source model
Assert.AreEqual(model.Count, filtered.Count, "#4-3 Count in filtered does not match model");
Assert.AreEqual(1000, filtered[filtered.Count - 2].Id, "#4-1 Item 1000 was not added in the correct location");
Assert.AreEqual(1001, filtered[filtered.Count - 1].Id, "#4-2 Item 1001 was not added in the correct location");
}
public void AddItemShouldTriggerCorrectChange()
{
var model = GridViewUtils.CreateModel();
var filtered = new FilterCollection <DataItem>(model);
filtered.Sort = GridViewUtils.SortEvenItemsBeforeOdd;
int newIndex = -1;
filtered.CollectionChanged += (sender, e) =>
{
Assert.AreEqual(NotifyCollectionChangedAction.Add, e.Action, "Action should be add");
newIndex = e.NewStartingIndex;
};
var item = new DataItem(1000);
filtered.Add(item);
var index = filtered.IndexOf(item);
Assert.AreEqual(filtered[index].Id, item.Id, "Index reported does not have correct item");
Assert.AreEqual(index, newIndex, "Triggered event should have correct index");
Assert.AreEqual(model.Count - 1, model.IndexOf(item), "Item should be added to the end of the model");
}
public void InsertItemShouldBeInSameOrderInModel()
{
var model = GridViewUtils.CreateModel();
var filtered = new FilterCollection <DataItem>(model);
filtered.Filter = GridViewUtils.KeepOddItemsFilter;
const int filterInsertIndex = 10;
var item = new DataItem(1000);
filtered.Insert(filterInsertIndex, item);
Assert.AreEqual(filtered[filterInsertIndex].Id, 21, "#1 Item should NOT be inserted at the specified index, since it is an even number");
Assert.AreEqual(filtered.IndexOf(item), -1, "#2 Item should NOT be in the filtered list");
Assert.AreEqual(model.IndexOf(filtered[filterInsertIndex]) - 1, model.IndexOf(item), "#3 Item should be inserted right before item at filter location");
item = new DataItem(1001);
filtered.Insert(filterInsertIndex, item);
Assert.AreEqual(filtered[filterInsertIndex].Id, 1001, "#4 Item with odd number should be inserted at the specified index");
Assert.AreEqual(filtered.IndexOf(item), filterInsertIndex, "#5 Item should be in the filtered list at the insert location");
Assert.AreEqual(model.IndexOf(filtered[filterInsertIndex + 1]) - 1, model.IndexOf(item), "#6 Item should be inserted right before item at filter location");
// refresh the list
filtered.Refresh();
// re-test inserted item, it should be at the same index.
Assert.AreEqual(filtered[filterInsertIndex].Id, 1001, "#7 Item with odd number should be inserted at the specified index");
Assert.AreEqual(filtered.IndexOf(item), filterInsertIndex, "#8 Item should be in the filtered list at the insert location");
Assert.AreEqual(model.IndexOf(filtered[filterInsertIndex + 1]) - 1, model.IndexOf(item), "#9 Item should be inserted right before item at filter location");
// ensure they are in the filter collection after the filter changes.
filtered.Filter = null;
Assert.IsTrue(filtered.Any(r => r.Id == 1000), "Item #1000 should be in the list");
Assert.IsTrue(filtered.Any(r => r.Id == 1001), "Item #1001 should be in the list");
}
